Driving and controlling mechanism for punching-machines.



N0- 826,395. PATENTED JULY 17, 1906.

R. G. WHITLOGK.

DRIVING AND CONTROLLING MECHANISM FOR PUNGHING MACHINES. APPLIOATION FILED Nov. 13, 1905.

3 SHEETS-SHEET l.

PATENTED JULY 17, 1906.

I R. G. WHITLOCK. DRIVING AND CONTROLLING MECHANISM FOR PUNOHING MACHINES.

APPLICATION FILED NOV. 13, 1905.

3 SHEETS-SHEET 2.

N0- 826,395. I PATENTED JULY 17, 1906.

R. G. WHITLOUK.

" DRIVING AND CONTROLLING MECHANISM FOR PUNCHING MAOHINES.' APILIOATIOK mmnnov. 13, 1905.

y 3 SHEETS-iliET 3.

DR|V|NG AND CONTROLLING MECHANISM FOR PUNCHlNG-MACHINES.

UNITED STATES PATENT OFFICE.

RALPH Gr. WHI'ILOGK, OF LOS ANGELES, CALIFORNIA.

Specification of Letters Patent.

Patented J uly 17, 1906.

To all whom. it may concern:

Be it known that I, RALPH G. .WHITLooK, a citizen of the United States, residing at Los Angeles, California, have invented certain new and useful Improvements in Driving and Controlling Mechanism for Punching- Machines, of which the following is a specification.

It is the object of my invention to provide a driving and controlling mechanism for punching and like mechines, such as is disclosed in an application for Letters Patent of the United States filed by me June 1, 1904, Serial No. 2 10,726, which driving and controlling mechanism will enable the machine to make one revolution and then be thrown out automatic ally or it may be locked in position to thus form a safety device for use in case of changing dies in. the machine to prevent the operation of the machine at such time that these changes are made and not requiring that the belt be thrown off or the power be shut off. The said controlling-mechanism is also capable of being set for a continuous motion of the machine, such as in the case of tag and label cutting.

The invention consists in the features and combination and arrangement of parts hereinafter described, and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a front view of a punching-machine embodying my invention. Fig. 2 is a side elevation of the lower portion of the machine shown in Fig. 1. Fig. 3 is a side view of the drivingpulley. Fig. 4 is a sectional view along the drive-shaft, and Fig. 5 is a front view of the disk which carries the controlling-c am. Figs. 6, 7, and 8 are diagrammatic views.

As in the machine above referred to, the present machine comprises a die table or carrier upon which the dies are suitably supported, a rotary gear-bar 2, journaled in the side frames 3, which gear-bar is provided with teeth to operate the punches through racks reciprocatin vertically and connected with the punch-ho ders, one of which is indicated at 4, the teeth of the bar 2 being indicated in dotted lines in Fig. 1 and the teeth of the rack-bar being indicated on the upper portion of the holder 4.

The bar 2 has arms 5, connected by pitman 6 with the face-plate 7 on the driveshaft 8. This drive-shaft carries loosely a belt-wheel or other suitable driving member 9, provided with a series of openings 10, as shown in Figs. 3 and 4. Adjacent this driving member a disk 11 is fixed on the shaft, carrying a pin 12, which is normally pressed toward the driving-pulley by a spring 18, arranged in the opening in the disk in which the trolled in its relation to the belt-wheel by a cam 15, carried by a disk 16 on the shaft and adapted to have shifting movement thereabout. The cam is secured to a block 17, which is arranged to have movement radially in a recess18 in the cam-disk, the said block being pressed normally outward by springs 19, surrounding pins 20, the outer ends of which have heads 21 to act as limitingstops for the outward movement of the camblock. The cam-block is held in its outward position rigidly by a slide 22, which is held to the block by Wing-nut 23, passing through a lug 24 on the slide. The cam 15 is in position and is adapted to Withdraw the pin 12 from engagement with the belt-pulley at a certain pointin the revolutionof the said pulley by the head of the pin riding up the incline 25, Fig. 5, onto the cam.

In order to start the machine from this position of rest, in which the head of the pin 'is fully on the cam, it is simply necessary to ,turn the cam-disk about the shaft so as to .withdraw the cam from the head of the pin, whereupon its spring 13 will force it into engagement with one of the openings in the belt-wheel. In order to effect this circumferential shifting'movement of the cam-disk, an arm 26 is attached thereto, Figs. 2 and 5, and this is connected by a link 27 toa footlever 28, pivoted at 29 to the frame and under tension of a spring 30, tending to raise the front end of the foot-lever and hold it in posi tion against astop 31. Bypressing down upon the foot-lever the cam-disk will be shifted i and the pin released, as described.

It will be noticed that the machine will now make one revolution only, whether or not the foot of the operator be removed from the pedal. If the foot is retained on the treadle, it must be removed and placed on again before the driving mechanism can make another revolution. If, however, after starting the machine the foot is removed at thrown out of operation at precisely the point at which it started, and in order to pin is located, as shown in Fig. 4. The pin isheaded, as at 14, and is adapted to be con-' once from the treadle, the machine will be IIO start it again a second pressure of the foot upon the treadle will be necessary If, however, after starting the machine from one position of the pin the foot is retained on the treadle, the machine will be stopped slightly before it completes the full revolution.

A safety-lock is provided for the driving or trip mechanism above described whereby the said trip may be instantly locked,'so that in case of changing dies or at any other desired times the machine may be locked against operation without, however, rendering it necessary to throw the belt or shut off the power. For this purpose a lever 32 is pivoted at 33 to the frame, its front end having a handle 34 and the said front portion moving in a guideway formed by a strap 35 and the adjacent portion of the frame. The lever is adapted to be held in different positions to which it may be adjusted, and this may be done by frictional restraint, such as will be derived from a spring 36 or by a suitable pawl device engaging, for instance, openings 37 in the frame. This lever is provided at an intermediate portion with a bend 38, reaching close beside the cam-disk and having a pin 39, adapted to fit in a notch 40 on the upper periphery of the cam-disk, so that by lowering this lever until the pin enters the said socket or recess the shiftable cam-disk will be held against circumferential movement, even though the foot-lever be pressed down accidentally or otherwise, thus preventing the machine from being operated so long as this safety or locking lever is in locking position.

The safety or looking lever is also utilized as a means for holding the parts in position for the continuous operation of the "machine: For this purpose the blocking-up plate 22 is removed from beneath the cam-block 17, and then by pressing down upon the safety or locking lever its pin will press the cam-block radially inward or downward, Fig. 5, and thus withdraw the cam 15 out of the path of the head of the pin 12, so that said pin will not be retracted and the revolutions will go on continuously until the cam-block is re leased from the pressure of the safety-lever and moves outwardly under the pressure of the springs 19 to carry the cam 15 out into the path of the head of the pin 12. The safety or looking lever, as before described, is held firmly in each of the positions to which it may be adjusted. When the cam-block is pressed outwardlybyits springs, it may be retained in this outward position firmly by inserting the retaining-plate 22.

I claim as my invention- 1'. In combination with a drivingshaft,the driving-pulley loose on the shaft, a member fixed to the shaft and carrying a clutch device to engage the driving-pulley, a cam shiftable circumferentially about the driveshaft to release the clutch device, means for shifting the cam and a locking device for holding the cam against shifting movement, substantially as described.

2. In combination with a driving-shaft the driving-pulley loose on the shaft, a member fixed to the shaft and carrying a clutch device to engage the driving-pulley, a cam means shiftable circumferentially about the drive-shaft, means for circumferentially shifting the cam means and a locking device,

said lockin device engaging the cam means directly, su stantially as described.

' 3. In combination with a driving-shaft, a belt-pulley loose on the shaft, a driven member adjacent the belt-pulle a clutch device carried by the driven mem er to engage the belt-pulley, a cam-disk shiftable circumferentially of the shaft to control the position of the clutch device a lever connected to' the cam-disk for shifting the same and a locking device consisting of a second lever having a portion to engage a part of the cam-disk,sub stantially as described.

4. In combination with a driving-shaft a driving-pulley loose on the shaft, a member fixed to the shaft and carrying a clutch device to engage the driving member, a cam shiftable circumferentially of the shaft to control the clutch device and shiftable radially of the shaft to and from the path of the said clutch device, means for shifting said cam circumferentially and means for shifting said cam radially substantially as described.

5. In combination with a driving-shaft a drive member loose on the shaft, a driven member having a clutch device to engage the driving member, a cam carrier or disk shiftable circumferentially of the shaft a cam on said carrier adjustable radially to and from the path of the clutch device, means for shifting said cam circumferentially and means for shiftin said cam radially substantially as describe 6. In combination With a drivin -shaft, a driving member loose on the shaft, and a driven member havin a clutch device to en- -gage the driving mem er, a carrier shiftable circumferentially of the shaft and having a radially-movable block, a cam on said block for operating the clutch device, a blockingplate and sprin s for pressing the cam-block outwardly to a line with the clutch device, and means for shifting said carrier circumferentially substantially as described.

7. In combination a driving member, a driven memberhaving a clutch device, a camcarrier movable circumferentially of the shaft, a cam-block movable radially of the cam-carrier and a lever for forcing said block inwardly to retract the cam from the path of the clutch device, substantially as described.

8. In combination, a drivin member, a driven member having a clutch evice, acamcarrier movable circumferentially of the shaft, a cam-block: movable radially of the cam-carrier and a lever for forcing said block inwardly to retract the earn from the ath of the clutch device, said lever serving a so as a lock for the cam-carrier, substantially as described.

9 In combination a driving member, a driven member having a clutch device to engage the same, a cam-carrier shiftable circumferentially of the shaft and having a notched radially-movable block to which the cam is attached, means for holdin the said block in its outward position and a ever having a ortion to engage thenotch of the block to loo the cam-carrier against shifting movement or to press the cam-block inwardl for the continuous revolution of the mac ine, substantially as described.

10. In combination, a driving member, a driven member having a clutch device and a circumferentially-shiftable cam for controlling the said clutch device to detach the driving and driven members at each revolution of the machine means to look the said shiftable cam against action and means to move the earn from the path of the clutch device for the continuous revolution of the machine, substantially as described.

In testimony whereof I aflix my signature in presence of two witnesses.

RALPH G. WHITLOCK.

Witnesses:

NATHAN NEWBY, J. LANDRUM GRAHAM. 

